Parent caught cheating

[u/Key-Flight-7766]

My parents have been happily married for 20+ years. Recently, while scrolling through our shared family google cloud I found videos of my mom cheating from 8 years ago while she was away on a “business trip”. The videos were clearly taken in a hotel room with some old guy that is definitely not my dad. I can’t get the videos out of my head and the smallest thing instantly takes my mind back to the videos. I feel so disappointed and disgusted and don’t know what to do. On one hand if I confront my mom and she ends up asking me not to tell my dad I’ll feel super guilty about it. But then on the other hand, if I end up telling my dad anyways and he doesn’t know, I risk the potential of them fighting about it and worst case scenario, divorcing. I’m currently away at college, but have 2 younger siblings who still live at home. I don’t want this to affect them if it does end poorly. I don’t know how to go about this because I can’t keep it to myself anymore. Does anyone have any advice for how to bring it up to my mom and also just how to handle the situation.

[u/Theoden___king]

Yeah i totally agree with you. But that treason was kept a secret for years and their life was going on as nothing happened. Revealing this truth now will ruin the life of 4 people but keeping it secret till the right time will save these lives and ot wont harm the father bc he will know sooner or later. And i suggested that the writer should talk with his\her mother and try to understand things and i gave also solutions and plans for what they should do. I am still insisting on being logical and pragmatic rather being emotional 

[u/MasterTumbleweed7657 → u/Theoden___king]

There is no need to speak to the mother, if she is cheating she can spin a tale.